Re: Computer Talk!!
noscript and keyscrambler are addons for firefox. The addon website is
Noscript is
Noscript disables javascript, java, and other plugins by default, unless explicitly enabled for whitelisted websites. Sometimes a bit tedious to use (you must whitelist web sites you trust explicitly, upon first visit), but stops you from stumbling on to a javascript exploit.
Keyscrambler is
Keyscrambler installs a low level keyboard driver which encrypts your keystrokes all the way between the keyboard driver and firefox. This makes it much harder for keyloggers to log what you type into the browser. This is a secondary line of defense, as you don't want a keylogger to record keystrokes to other programs either, but it means that by the time you find out you have been hacked, your web browser keystrokes were probably still safe.
Sandboxing is the concept of putting a program in an isolated space, a sandbox, where it can play, but cannot affect the rest of your computer. One such program that does this is sandboxie
If you run your web browser in a sandbox, it cannot make changes to your computer unless you give it explicit permission (and you can see what it changed). So if your browser is hacked, the exploit is limited to inside the sandbox. You can also run other dangerous or suspicious programs in a sandbox, e.g. something you downloaded and don't trust.
Windows Vista, and Linux, Unix, and modern Mac OS also use the concept of a sandbox, in that all programs are by default inside a sandbox. If a program wants to access certain vital parts of your computer, it requires explicit permission from the user. Unless this mechanism is bypassed, it stops 99.9% of viruses and worms. That's why, if you use Linux or Unix, you basically don't need a virus scanner, since making a virus targeting those systems is much harder.